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Chapter 4
Power-On Self-Test (POST)
Each time you turn on the system, the Power-on Self Test (POST) is initiated. Several items are tested during
POST, but is for the most part transparent to the user.
The Power-On Self Test (POST) is a BIOS procedure that boots the system, initializes and diagnoses the
system components, and controls the operation of the power-on password option. If POST discovers errors in
system operations at power-on, it displays error messages on screen, generates a check point code at port
80h or even halts the system if the error is fatal.
The main components on the main board that must be diagnosed and/or initialized by POST to ensure system
functionality are as follows:
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Microprocessor with built-in numeric co-processor and cache memory subsystem
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Direct Memory Access (DMA) controller
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Interrupt system
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Three programmable timers
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ROM subsystem
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RAM subsystem
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RTC RAM subsystem and real time clock/calendar with battery backup
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Onboard serial interface controller
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Onboard parallel interface controller
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Embedded hard disk interface and one diskette drive interface
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Keyboard and auxiliary device controllers
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Serial port
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Parallel port
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USB ports
Summary of Contents for S511P
Page 12: ...6 Chapter 1 12 Burgundy Parallel printer port Label Icon Color Description ...
Page 67: ...Chapter 3 61 5 Disconnect the FDD cable from the FDD then remove the cable from the FDD ...
Page 71: ...Chapter 3 65 4 Remove the HDD screw soft mount from the HDD case ...
Page 72: ...66 Chapter 3 ...
Page 82: ...76 Chapter 4 ...
Page 88: ...82 Chapter 6 Veriton FP2 Exploded Diagram ...
Page 89: ...Chapter 6 83 ...
Page 90: ...84 Chapter 6 ...
Page 108: ...102 Appendix A ...
Page 118: ...114 Appendix B ...
Page 120: ...114 Appendix C ...